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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-19 01:47:29 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-19 01:47:29 +0000
commit0ebf5bdf043a27fd3dfb7f92e0cb63d88954c44d (patch)
treea31f07c9bcca9d56ce61e9a1ffd30ef350d513aa /dom/media/MediaInfo.h
parentInitial commit. (diff)
downloadfirefox-esr-0ebf5bdf043a27fd3dfb7f92e0cb63d88954c44d.tar.xz
firefox-esr-0ebf5bdf043a27fd3dfb7f92e0cb63d88954c44d.zip
Adding upstream version 115.8.0esr.upstream/115.8.0esr
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'dom/media/MediaInfo.h')
-rw-r--r--dom/media/MediaInfo.h673
1 files changed, 673 insertions, 0 deletions
diff --git a/dom/media/MediaInfo.h b/dom/media/MediaInfo.h
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+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+#if !defined(MediaInfo_h)
+# define MediaInfo_h
+
+# include "mozilla/UniquePtr.h"
+# include "mozilla/RefPtr.h"
+# include "mozilla/Variant.h"
+# include "nsTHashMap.h"
+# include "nsString.h"
+# include "nsTArray.h"
+# include "AudioConfig.h"
+# include "ImageTypes.h"
+# include "MediaData.h"
+# include "TimeUnits.h"
+# include "mozilla/gfx/Point.h" // for gfx::IntSize
+# include "mozilla/gfx/Rect.h" // for gfx::IntRect
+# include "mozilla/gfx/Types.h" // for gfx::ColorDepth
+
+namespace mozilla {
+
+class AudioInfo;
+class VideoInfo;
+class TextInfo;
+
+class MetadataTag {
+ public:
+ MetadataTag(const nsACString& aKey, const nsACString& aValue)
+ : mKey(aKey), mValue(aValue) {}
+ nsCString mKey;
+ nsCString mValue;
+ bool operator==(const MetadataTag& rhs) const {
+ return mKey == rhs.mKey && mValue == rhs.mValue;
+ }
+};
+
+typedef nsTHashMap<nsCStringHashKey, nsCString> MetadataTags;
+
+// Start codec specific data structs. If modifying these remember to also
+// modify the MediaIPCUtils so that any new members are sent across IPC.
+
+// Generic types, we should prefer a specific type when we can.
+
+// Generic empty type. Prefer to use a specific type but not populate members
+// if possible, as that helps with type checking.
+struct NoCodecSpecificData {
+ bool operator==(const NoCodecSpecificData& rhs) const { return true; }
+};
+
+// Generic binary blob type. Prefer not to use this structure. It's here to ease
+// the transition to codec specific structures in the code.
+struct AudioCodecSpecificBinaryBlob {
+ bool operator==(const AudioCodecSpecificBinaryBlob& rhs) const {
+ return *mBinaryBlob == *rhs.mBinaryBlob;
+ }
+
+ RefPtr<MediaByteBuffer> mBinaryBlob{new MediaByteBuffer};
+};
+
+// End generic types.
+
+// Audio codec specific data types.
+
+struct AacCodecSpecificData {
+ bool operator==(const AacCodecSpecificData& rhs) const {
+ return *mEsDescriptorBinaryBlob == *rhs.mEsDescriptorBinaryBlob &&
+ *mDecoderConfigDescriptorBinaryBlob ==
+ *rhs.mDecoderConfigDescriptorBinaryBlob;
+ }
+ // An explanation for the necessity of handling the encoder delay and the
+ // padding is available here:
+ // https://developer.apple.com/library/archive/documentation/QuickTime/QTFF/QTFFAppenG/QTFFAppenG.html
+
+ // The number of frames that should be skipped from the beginning of the
+ // decoded stream.
+ uint32_t mEncoderDelayFrames{0};
+
+ // The total number of frames of the media, that is, excluding the encoder
+ // delay and the padding of the last packet, that must be discarded.
+ uint64_t mMediaFrameCount{0};
+
+ // The bytes of the ES_Descriptor field parsed out of esds box. We store
+ // this as a blob as some decoders want this.
+ RefPtr<MediaByteBuffer> mEsDescriptorBinaryBlob{new MediaByteBuffer};
+
+ // The bytes of the DecoderConfigDescriptor field within the parsed
+ // ES_Descriptor. This is a subset of the ES_Descriptor, so it is technically
+ // redundant to store both. However, some decoders expect this binary blob
+ // instead of the whole ES_Descriptor, so both are stored for convenience
+ // and clarity (rather than reparsing the ES_Descriptor).
+ // TODO(bug 1768562): use a Span to track this rather than duplicating data.
+ RefPtr<MediaByteBuffer> mDecoderConfigDescriptorBinaryBlob{
+ new MediaByteBuffer};
+};
+
+struct FlacCodecSpecificData {
+ bool operator==(const FlacCodecSpecificData& rhs) const {
+ return *mStreamInfoBinaryBlob == *rhs.mStreamInfoBinaryBlob;
+ }
+
+ // A binary blob of the data from the METADATA_BLOCK_STREAMINFO block
+ // in the flac header.
+ // See https://xiph.org/flac/format.html#metadata_block_streaminfo
+ // Consumers of this data (ffmpeg) take a blob, so we don't parse the data,
+ // just store the blob. For headerless flac files this will be left empty.
+ RefPtr<MediaByteBuffer> mStreamInfoBinaryBlob{new MediaByteBuffer};
+};
+
+struct Mp3CodecSpecificData {
+ bool operator==(const Mp3CodecSpecificData& rhs) const {
+ return mEncoderDelayFrames == rhs.mEncoderDelayFrames &&
+ mEncoderPaddingFrames == rhs.mEncoderPaddingFrames;
+ }
+
+ // The number of frames that should be skipped from the beginning of the
+ // decoded stream.
+ // See https://bugzilla.mozilla.org/show_bug.cgi?id=1566389 for more info.
+ uint32_t mEncoderDelayFrames{0};
+
+ // The number of frames that should be skipped from the end of the decoded
+ // stream.
+ // See https://bugzilla.mozilla.org/show_bug.cgi?id=1566389 for more info.
+ uint32_t mEncoderPaddingFrames{0};
+};
+
+struct OpusCodecSpecificData {
+ bool operator==(const OpusCodecSpecificData& rhs) const {
+ return mContainerCodecDelayMicroSeconds ==
+ rhs.mContainerCodecDelayMicroSeconds &&
+ *mHeadersBinaryBlob == *rhs.mHeadersBinaryBlob;
+ }
+ // The codec delay (aka pre-skip) in microseconds.
+ // See https://tools.ietf.org/html/rfc7845#section-4.2 for more info.
+ // This member should store the codec delay parsed from the container file.
+ // In some cases (such as the ogg container), this information is derived
+ // from the same headers stored in the header blob, making storing this
+ // separately redundant. However, other containers store the delay in
+ // addition to the header blob, in which case we can check this container
+ // delay against the header delay to ensure they're consistent.
+ int64_t mContainerCodecDelayMicroSeconds{-1};
+
+ // A binary blob of opus header data, specifically the Identification Header.
+ // See https://datatracker.ietf.org/doc/html/rfc7845.html#section-5.1
+ RefPtr<MediaByteBuffer> mHeadersBinaryBlob{new MediaByteBuffer};
+};
+
+struct VorbisCodecSpecificData {
+ bool operator==(const VorbisCodecSpecificData& rhs) const {
+ return *mHeadersBinaryBlob == *rhs.mHeadersBinaryBlob;
+ }
+
+ // A binary blob of headers in the 'extradata' format (the format ffmpeg
+ // expects for packing the extradata field). This is also the format some
+ // containers use for storing the data. Specifically, this format consists of
+ // the page_segments field, followed by the segment_table field, followed by
+ // the three Vorbis header packets, respectively the identification header,
+ // the comments header, and the setup header, in that order.
+ // See also https://xiph.org/vorbis/doc/framing.html and
+ // https://xiph.org/vorbis/doc/Vorbis_I_spec.html#x1-610004.2
+ RefPtr<MediaByteBuffer> mHeadersBinaryBlob{new MediaByteBuffer};
+};
+
+struct WaveCodecSpecificData {
+ bool operator==(const WaveCodecSpecificData& rhs) const { return true; }
+ // Intentionally empty. We don't store any wave specific data, but this
+ // variant is useful for type checking.
+};
+
+using AudioCodecSpecificVariant =
+ mozilla::Variant<NoCodecSpecificData, AudioCodecSpecificBinaryBlob,
+ AacCodecSpecificData, FlacCodecSpecificData,
+ Mp3CodecSpecificData, OpusCodecSpecificData,
+ VorbisCodecSpecificData, WaveCodecSpecificData>;
+
+// Returns a binary blob representation of the AudioCodecSpecificVariant. This
+// does not guarantee that a binary representation exists. Will return an empty
+// buffer if no representation exists. Prefer `GetAudioCodecSpecificBlob` which
+// asserts if getting a blob is unexpected for a given codec config.
+inline already_AddRefed<MediaByteBuffer> ForceGetAudioCodecSpecificBlob(
+ const AudioCodecSpecificVariant& v) {
+ return v.match(
+ [](const NoCodecSpecificData&) {
+ return RefPtr<MediaByteBuffer>(new MediaByteBuffer).forget();
+ },
+ [](const AudioCodecSpecificBinaryBlob& binaryBlob) {
+ return RefPtr<MediaByteBuffer>(binaryBlob.mBinaryBlob).forget();
+ },
+ [](const AacCodecSpecificData& aacData) {
+ // We return the mDecoderConfigDescriptor blob here, as it is more
+ // commonly used by decoders at time of writing than the
+ // ES_Descriptor data. However, consumers of this data should
+ // prefer getting one or the other specifically, rather than
+ // calling this.
+ return RefPtr<MediaByteBuffer>(
+ aacData.mDecoderConfigDescriptorBinaryBlob)
+ .forget();
+ },
+ [](const FlacCodecSpecificData& flacData) {
+ return RefPtr<MediaByteBuffer>(flacData.mStreamInfoBinaryBlob).forget();
+ },
+ [](const Mp3CodecSpecificData&) {
+ return RefPtr<MediaByteBuffer>(new MediaByteBuffer).forget();
+ },
+ [](const OpusCodecSpecificData& opusData) {
+ return RefPtr<MediaByteBuffer>(opusData.mHeadersBinaryBlob).forget();
+ },
+ [](const VorbisCodecSpecificData& vorbisData) {
+ return RefPtr<MediaByteBuffer>(vorbisData.mHeadersBinaryBlob).forget();
+ },
+ [](const WaveCodecSpecificData&) {
+ return RefPtr<MediaByteBuffer>(new MediaByteBuffer).forget();
+ });
+}
+
+// Same as `ForceGetAudioCodecSpecificBlob` but with extra asserts to ensure
+// we're not trying to get a binary blob from codecs where we don't store the
+// information as a blob or where a blob is ambiguous.
+inline already_AddRefed<MediaByteBuffer> GetAudioCodecSpecificBlob(
+ const AudioCodecSpecificVariant& v) {
+ MOZ_ASSERT(!v.is<NoCodecSpecificData>(),
+ "NoCodecSpecificData shouldn't be used as a blob");
+ MOZ_ASSERT(!v.is<AacCodecSpecificData>(),
+ "AacCodecSpecificData has 2 blobs internally, one should "
+ "explicitly be selected");
+ MOZ_ASSERT(!v.is<Mp3CodecSpecificData>(),
+ "Mp3CodecSpecificData shouldn't be used as a blob");
+
+ return ForceGetAudioCodecSpecificBlob(v);
+}
+
+// End audio codec specific data types.
+
+// End codec specific data structs.
+
+class TrackInfo {
+ public:
+ enum TrackType { kUndefinedTrack, kAudioTrack, kVideoTrack, kTextTrack };
+ TrackInfo(TrackType aType, const nsAString& aId, const nsAString& aKind,
+ const nsAString& aLabel, const nsAString& aLanguage, bool aEnabled,
+ uint32_t aTrackId)
+ : mId(aId),
+ mKind(aKind),
+ mLabel(aLabel),
+ mLanguage(aLanguage),
+ mEnabled(aEnabled),
+ mTrackId(aTrackId),
+ mIsRenderedExternally(false),
+ mType(aType) {
+ MOZ_COUNT_CTOR(TrackInfo);
+ }
+
+ // Only used for backward compatibility. Do not use in new code.
+ void Init(const nsAString& aId, const nsAString& aKind,
+ const nsAString& aLabel, const nsAString& aLanguage,
+ bool aEnabled) {
+ mId = aId;
+ mKind = aKind;
+ mLabel = aLabel;
+ mLanguage = aLanguage;
+ mEnabled = aEnabled;
+ }
+
+ // Fields common with MediaTrack object.
+ nsString mId;
+ nsString mKind;
+ nsString mLabel;
+ nsString mLanguage;
+ bool mEnabled;
+
+ uint32_t mTrackId;
+
+ nsCString mMimeType;
+ media::TimeUnit mDuration;
+ media::TimeUnit mMediaTime;
+ uint32_t mTimeScale = 0;
+ CryptoTrack mCrypto;
+
+ CopyableTArray<MetadataTag> mTags;
+
+ // True if the track is gonna be (decrypted)/decoded and
+ // rendered directly by non-gecko components.
+ bool mIsRenderedExternally;
+
+ virtual AudioInfo* GetAsAudioInfo() { return nullptr; }
+ virtual VideoInfo* GetAsVideoInfo() { return nullptr; }
+ virtual TextInfo* GetAsTextInfo() { return nullptr; }
+ virtual const AudioInfo* GetAsAudioInfo() const { return nullptr; }
+ virtual const VideoInfo* GetAsVideoInfo() const { return nullptr; }
+ virtual const TextInfo* GetAsTextInfo() const { return nullptr; }
+
+ bool IsAudio() const { return !!GetAsAudioInfo(); }
+ bool IsVideo() const { return !!GetAsVideoInfo(); }
+ bool IsText() const { return !!GetAsTextInfo(); }
+ TrackType GetType() const { return mType; }
+
+ bool virtual IsValid() const = 0;
+
+ virtual UniquePtr<TrackInfo> Clone() const = 0;
+
+ MOZ_COUNTED_DTOR_VIRTUAL(TrackInfo)
+
+ protected:
+ TrackInfo(const TrackInfo& aOther) {
+ mId = aOther.mId;
+ mKind = aOther.mKind;
+ mLabel = aOther.mLabel;
+ mLanguage = aOther.mLanguage;
+ mEnabled = aOther.mEnabled;
+ mTrackId = aOther.mTrackId;
+ mMimeType = aOther.mMimeType;
+ mDuration = aOther.mDuration;
+ mMediaTime = aOther.mMediaTime;
+ mCrypto = aOther.mCrypto;
+ mIsRenderedExternally = aOther.mIsRenderedExternally;
+ mType = aOther.mType;
+ mTags = aOther.mTags.Clone();
+ MOZ_COUNT_CTOR(TrackInfo);
+ }
+ bool IsEqualTo(const TrackInfo& rhs) const;
+
+ private:
+ TrackType mType;
+};
+
+// String version of track type.
+const char* TrackTypeToStr(TrackInfo::TrackType aTrack);
+
+// Stores info relevant to presenting media frames.
+class VideoInfo : public TrackInfo {
+ public:
+ enum Rotation {
+ kDegree_0 = 0,
+ kDegree_90 = 90,
+ kDegree_180 = 180,
+ kDegree_270 = 270,
+ };
+ VideoInfo() : VideoInfo(-1, -1) {}
+
+ VideoInfo(int32_t aWidth, int32_t aHeight)
+ : VideoInfo(gfx::IntSize(aWidth, aHeight)) {}
+
+ explicit VideoInfo(const gfx::IntSize& aSize)
+ : TrackInfo(kVideoTrack, u"2"_ns, u"main"_ns, u""_ns, u""_ns, true, 2),
+ mDisplay(aSize),
+ mStereoMode(StereoMode::MONO),
+ mImage(aSize),
+ mCodecSpecificConfig(new MediaByteBuffer),
+ mExtraData(new MediaByteBuffer),
+ mRotation(kDegree_0) {}
+
+ VideoInfo(const VideoInfo& aOther) = default;
+
+ bool operator==(const VideoInfo& rhs) const;
+
+ bool IsValid() const override {
+ return mDisplay.width > 0 && mDisplay.height > 0;
+ }
+
+ VideoInfo* GetAsVideoInfo() override { return this; }
+
+ const VideoInfo* GetAsVideoInfo() const override { return this; }
+
+ UniquePtr<TrackInfo> Clone() const override {
+ return MakeUnique<VideoInfo>(*this);
+ }
+
+ void SetAlpha(bool aAlphaPresent) { mAlphaPresent = aAlphaPresent; }
+
+ bool HasAlpha() const { return mAlphaPresent; }
+
+ gfx::IntRect ImageRect() const {
+ if (!mImageRect) {
+ return gfx::IntRect(0, 0, mImage.width, mImage.height);
+ }
+ return *mImageRect;
+ }
+
+ void SetImageRect(const gfx::IntRect& aRect) { mImageRect = Some(aRect); }
+ void ResetImageRect() { mImageRect.reset(); }
+
+ // Returned the crop rectangle scaled to aWidth/aHeight size relative to
+ // mImage size.
+ // If aWidth and aHeight are identical to the original
+ // mImage.width/mImage.height then the scaling ratio will be 1. This is used
+ // for when the frame size is different from what the container reports. This
+ // is legal in WebM, and we will preserve the ratio of the crop rectangle as
+ // it was reported relative to the picture size reported by the container.
+ gfx::IntRect ScaledImageRect(int64_t aWidth, int64_t aHeight) const {
+ if ((aWidth == mImage.width && aHeight == mImage.height) || !mImage.width ||
+ !mImage.height) {
+ return ImageRect();
+ }
+
+ gfx::IntRect imageRect = ImageRect();
+ int64_t w = (aWidth * imageRect.Width()) / mImage.width;
+ int64_t h = (aHeight * imageRect.Height()) / mImage.height;
+ if (!w || !h) {
+ return imageRect;
+ }
+
+ imageRect.x = (imageRect.x * aWidth) / mImage.width;
+ imageRect.y = (imageRect.y * aHeight) / mImage.height;
+ imageRect.SetWidth(w);
+ imageRect.SetHeight(h);
+ return imageRect;
+ }
+
+ Rotation ToSupportedRotation(int32_t aDegree) const {
+ switch (aDegree) {
+ case 90:
+ return kDegree_90;
+ case 180:
+ return kDegree_180;
+ case 270:
+ return kDegree_270;
+ default:
+ NS_WARNING_ASSERTION(aDegree == 0, "Invalid rotation degree, ignored");
+ return kDegree_0;
+ }
+ }
+
+ // Size in pixels at which the video is rendered. This is after it has
+ // been scaled by its aspect ratio.
+ gfx::IntSize mDisplay;
+
+ // Indicates the frame layout for single track stereo videos.
+ StereoMode mStereoMode;
+
+ // Size of the decoded video's image.
+ gfx::IntSize mImage;
+
+ RefPtr<MediaByteBuffer> mCodecSpecificConfig;
+ RefPtr<MediaByteBuffer> mExtraData;
+
+ // Describing how many degrees video frames should be rotated in clock-wise to
+ // get correct view.
+ Rotation mRotation;
+
+ // Should be 8, 10 or 12. Default value is 8.
+ gfx::ColorDepth mColorDepth = gfx::ColorDepth::COLOR_8;
+
+ // Matrix coefficients (if specified by the video) imply a colorspace.
+ Maybe<gfx::YUVColorSpace> mColorSpace;
+
+ // Color primaries are independent from the coefficients.
+ Maybe<gfx::ColorSpace2> mColorPrimaries;
+
+ // Transfer functions get their own member, which may not be strongly
+ // correlated to the colorspace.
+ Maybe<gfx::TransferFunction> mTransferFunction;
+
+ // True indicates no restriction on Y, U, V values (otherwise 16-235 for 8
+ // bits etc)
+ gfx::ColorRange mColorRange = gfx::ColorRange::LIMITED;
+
+ Maybe<int32_t> GetFrameRate() const { return mFrameRate; }
+ void SetFrameRate(int32_t aRate) { mFrameRate = Some(aRate); }
+
+ private:
+ friend struct IPC::ParamTraits<VideoInfo>;
+
+ // mImage may be cropped; currently only used with the WebM container.
+ // If unset, no cropping is to occur.
+ Maybe<gfx::IntRect> mImageRect;
+
+ // Indicates whether or not frames may contain alpha information.
+ bool mAlphaPresent = false;
+
+ Maybe<int32_t> mFrameRate;
+};
+
+class AudioInfo : public TrackInfo {
+ public:
+ AudioInfo()
+ : TrackInfo(kAudioTrack, u"1"_ns, u"main"_ns, u""_ns, u""_ns, true, 1),
+ mRate(0),
+ mChannels(0),
+ mChannelMap(AudioConfig::ChannelLayout::UNKNOWN_MAP),
+ mBitDepth(0),
+ mProfile(0),
+ mExtendedProfile(0) {}
+
+ AudioInfo(const AudioInfo& aOther) = default;
+
+ bool operator==(const AudioInfo& rhs) const;
+
+ static const uint32_t MAX_RATE = 640000;
+ static const uint32_t MAX_CHANNEL_COUNT = 256;
+
+ bool IsValid() const override {
+ return mChannels > 0 && mChannels <= MAX_CHANNEL_COUNT && mRate > 0 &&
+ mRate <= MAX_RATE;
+ }
+
+ AudioInfo* GetAsAudioInfo() override { return this; }
+
+ const AudioInfo* GetAsAudioInfo() const override { return this; }
+
+ UniquePtr<TrackInfo> Clone() const override {
+ return MakeUnique<AudioInfo>(*this);
+ }
+
+ // Sample rate.
+ uint32_t mRate;
+
+ // Number of audio channels.
+ uint32_t mChannels;
+ // The AudioConfig::ChannelLayout map. Channels are ordered as per SMPTE
+ // definition. A value of UNKNOWN_MAP indicates unknown layout.
+ // ChannelMap is an unsigned bitmap compatible with Windows' WAVE and FFmpeg
+ // channel map.
+ AudioConfig::ChannelLayout::ChannelMap mChannelMap;
+
+ // Bits per sample.
+ uint32_t mBitDepth;
+
+ // Codec profile.
+ int8_t mProfile;
+
+ // Extended codec profile.
+ int8_t mExtendedProfile;
+
+ AudioCodecSpecificVariant mCodecSpecificConfig{NoCodecSpecificData{}};
+};
+
+class EncryptionInfo {
+ public:
+ EncryptionInfo() : mEncrypted(false) {}
+
+ struct InitData {
+ template <typename AInitDatas>
+ InitData(const nsAString& aType, AInitDatas&& aInitData)
+ : mType(aType), mInitData(std::forward<AInitDatas>(aInitData)) {}
+
+ // Encryption type to be passed to JS. Usually `cenc'.
+ nsString mType;
+
+ // Encryption data.
+ CopyableTArray<uint8_t> mInitData;
+ };
+ typedef CopyableTArray<InitData> InitDatas;
+
+ // True if the stream has encryption metadata
+ bool IsEncrypted() const { return mEncrypted; }
+
+ void Reset() {
+ mEncrypted = false;
+ mInitDatas.Clear();
+ }
+
+ template <typename AInitDatas>
+ void AddInitData(const nsAString& aType, AInitDatas&& aInitData) {
+ mInitDatas.AppendElement(
+ InitData(aType, std::forward<AInitDatas>(aInitData)));
+ mEncrypted = true;
+ }
+
+ void AddInitData(const EncryptionInfo& aInfo) {
+ mInitDatas.AppendElements(aInfo.mInitDatas);
+ mEncrypted = !!mInitDatas.Length();
+ }
+
+ // One 'InitData' per encrypted buffer.
+ InitDatas mInitDatas;
+
+ private:
+ bool mEncrypted;
+};
+
+class MediaInfo {
+ public:
+ bool HasVideo() const { return mVideo.IsValid(); }
+
+ void EnableVideo() {
+ if (HasVideo()) {
+ return;
+ }
+ // Set dummy values so that HasVideo() will return true;
+ // See VideoInfo::IsValid()
+ mVideo.mDisplay = gfx::IntSize(1, 1);
+ }
+
+ bool HasAudio() const { return mAudio.IsValid(); }
+
+ void EnableAudio() {
+ if (HasAudio()) {
+ return;
+ }
+ // Set dummy values so that HasAudio() will return true;
+ // See AudioInfo::IsValid()
+ mAudio.mChannels = 2;
+ mAudio.mRate = 44100;
+ }
+
+ bool IsEncrypted() const {
+ return (HasAudio() && mAudio.mCrypto.IsEncrypted()) ||
+ (HasVideo() && mVideo.mCrypto.IsEncrypted());
+ }
+
+ bool HasValidMedia() const { return HasVideo() || HasAudio(); }
+
+ // TODO: Store VideoInfo and AudioIndo in arrays to support multi-tracks.
+ VideoInfo mVideo;
+ AudioInfo mAudio;
+
+ // If the metadata includes a duration, we store it here.
+ media::NullableTimeUnit mMetadataDuration;
+
+ // The Ogg reader tries to kinda-sorta compute the duration by seeking to the
+ // end and determining the timestamp of the last frame. This isn't useful as
+ // a duration until we know the start time, so we need to track it separately.
+ media::NullableTimeUnit mUnadjustedMetadataEndTime;
+
+ // True if the media is seekable (i.e. supports random access).
+ bool mMediaSeekable = true;
+
+ // True if the media is only seekable within its buffered ranges.
+ bool mMediaSeekableOnlyInBufferedRanges = false;
+
+ EncryptionInfo mCrypto;
+
+ // The minimum of start times of audio and video tracks.
+ // Use to map the zero time on the media timeline to the first frame.
+ media::TimeUnit mStartTime;
+};
+
+class TrackInfoSharedPtr {
+ NS_INLINE_DECL_THREADSAFE_REFCOUNTING(TrackInfoSharedPtr)
+ public:
+ TrackInfoSharedPtr(const TrackInfo& aOriginal, uint32_t aStreamID)
+ : mInfo(aOriginal.Clone()),
+ mStreamSourceID(aStreamID),
+ mMimeType(mInfo->mMimeType) {}
+
+ uint32_t GetID() const { return mStreamSourceID; }
+
+ operator const TrackInfo*() const { return mInfo.get(); }
+
+ const TrackInfo* operator*() const { return mInfo.get(); }
+
+ const TrackInfo* operator->() const {
+ MOZ_ASSERT(mInfo.get(), "dereferencing a UniquePtr containing nullptr");
+ return mInfo.get();
+ }
+
+ const AudioInfo* GetAsAudioInfo() const {
+ return mInfo ? mInfo->GetAsAudioInfo() : nullptr;
+ }
+
+ const VideoInfo* GetAsVideoInfo() const {
+ return mInfo ? mInfo->GetAsVideoInfo() : nullptr;
+ }
+
+ const TextInfo* GetAsTextInfo() const {
+ return mInfo ? mInfo->GetAsTextInfo() : nullptr;
+ }
+
+ private:
+ ~TrackInfoSharedPtr() = default;
+ UniquePtr<TrackInfo> mInfo;
+ // A unique ID, guaranteed to change when changing streams.
+ uint32_t mStreamSourceID;
+
+ public:
+ const nsCString& mMimeType;
+};
+
+} // namespace mozilla
+
+#endif // MediaInfo_h